.Net: Library for acting like a browser? [on hold]

It makes a long time that I'm looking for some library/.Net class to act like a browser.

I'm aware of HttpWebRequest, but I'm looking for some layer on the top of it.

The goal would be to have a WebBrowser class, where we can just indicate the next action to do and it takes care of the rest:

• Storing cookies


• Giving a friendly way of filling formular(like detecting them, if it uses POST/GET)(and handling automatically the format of the arguments)


• Eventually handling a "job list" with a minimum time between each job

...

I guess that I'm fully capable of doing this kind of library, that it should not take that long, but I don't want to reinvent the wheel if someone already did something(which maybe directly works better than what I'm would do :)

So, are you aware of such library?